SBVU069 February   2021 TPS785-Q1

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Before You Begin
  3. 2EVM Setup
    1. 2.1 Input/Output Connector and Jumper Descriptions
      1. 2.1.1  J1 – VIN (Banana Jack)
      2. 2.1.2  J2 – VOUT (Banana Jack)
      3. 2.1.3  J3 – VIN_S
      4. 2.1.4  J4 – VOUT_S
      5. 2.1.5  J5 – VEN
      6. 2.1.6  J6 – GND (Banana Jack)
      7. 2.1.7  J7 – GND (Banana Jack)
      8. 2.1.8  J8 – OUTPUT VOLTAGE SET
      9. 2.1.9  J9 – VIN (TERMINAL BLOCK)
      10. 2.1.10 J10 – VOUT (TERMINAL BLOCK)
      11. 2.1.11 J11 – DEBUG TERMINAL
      12. 2.1.12 TP1 – VIN_S
      13. 2.1.13 TP2 – VOUT_S
      14. 2.1.14 TP3 – VEN
      15. 2.1.15 TP4 – TP6 – GND
  4. 3Soldering Guidelines
  5. 4Equipment Connection
  6. 5Operation
  7. 6PCB Layout
  8. 7Schematic
  9. 8Bill of Materials

2.1.9 J9 – VIN (TERMINAL BLOCK)

Input power-supply voltage connector. Twist together the positive input lead and ground return lead from the input power supply, and keep them as short as possible to minimize input inductance. Add additional bulk capacitance between the input supply and ground (use the C1, C2 footprints) if the supply leads are greater than six inches. For example, an additional 47-µF electrolytic capacitor connected from the input supply (J1) to ground can improve the transient response of the TPS785-Q1, and eliminates unwanted ringing on the input because of long wire connections.